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Subject[Question] Are the trace APIs declared by "TRACE_EVENT(irq_handler_entry" allowed to be used in Ko?
After patch 7e066fb870fc ("tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()"),
the trace APIs declared by "TRACE_EVENT(irq_handler_entry" can not be directly used
by ko, because it's not explicitly exported by EXPORT_TRACEPOINT_SYMBOL_GPL or

Did we miss it? or it's not recommended to be used in ko?


commit 7e066fb870fcd1025ec3ba7bbde5d541094f4ce1
Author: Mathieu Desnoyers <>
Date: Fri Nov 14 17:47:47 2008 -0500

tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()

Impact: API *CHANGE*. Must update all tracepoint users.

Add DEFINE_TRACE() to tracepoints to let them declare the tracepoint
structure in a single spot for all the kernel. It helps reducing memory
consumption, especially when declaring a lot of tracepoints, e.g. for
kmalloc tracing.

*API CHANGE WARNING*: now, DECLARE_TRACE() must be used in headers for
tracepoint declarations rather than DEFINE_TRACE(). This is the sane way
to do it. The name previously used was misleading.

Updates scheduler instrumentation to follow this API change.


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